Graphite powder is used in machines to

Options

A. enhance friction
B. enchance profit
C. reduce friction
D. reduce efficiency

Answer

**Step-by-Step Solution:**

1. **Understanding Graphite:**
- Graphite is a form of carbon. It has a unique structure that allows it to have specific properties, particularly in terms of lubrication.

2. **Properties of Graphite:**
- Graphite has a layered structure, which allows the layers to slide over each other easily. This characteristic makes it an effective lubricant.

3. **Application in Machines:**
- In machines, various components move against each other, which can create friction. High friction can lead to wear and tear of the machine parts, reducing their efficiency and lifespan.

4. **Role of Graphite Powder:**
- Graphite powder is used in machines to reduce friction between moving parts. By applying graphite powder, the friction between surfaces is minimized, which helps in smoother operation.

5. **Use in Bearings:**
- Bearings are crucial components in machines that help in reducing friction. Graphite powder is often used in bearings to enhance their performance by providing lubrication.

6. **Conclusion:**
- Therefore, the primary reason graphite powder is used in machines is to reduce friction, which helps in improving the efficiency and longevity of the machinery.

---